- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 201207-06
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: JRuby: Denial of Service
     Date: July 09, 2012
     Bugs: #396305
       ID: 201207-06

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=======
A hash collision vulnerability in JRuby allows remote attackers to
cause a Denial of Service condition.

Background
=========
JRuby is a Java-based Ruby interpreter implementation.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-java/jruby              < 1.6.5.1                 >= 1.6.5.1

Description
==========
JRuby does not properly randomize hash functions to protect against
hash collision attacks.

Impact
=====
A remote attacker could send a specially crafted input, possibly
resulting in a Denial of Service condition.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All JRuby users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-java/jruby-1.6.5.1"

References
=========
[ 1 ] CVE-2011-4838
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4838

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/201207-06

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
======
Copyright 2012 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5/